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Greenlee 7212SP-3/4P knockout punch, silver steel body with black handle, 3/4 inch size

Greenlee

Greenlee 7212SP-3/4P Speed Punch 3/4 in 10 ga hand tool

SKU CH-JT4A-42AQ7 MPN 7212SP-3/4P

A knockout punch for mild steel, aluminum, fiberglass and plastic that splits slugs for easy removal and fits 10 ga material

  • TypeHand Held Punches
  • Three-step setup speeds up knockout jobs
  • Splits slugs in half for easy removal from die or stud
  • Handles 10 ga mild steel, aluminum, fiberglass and plastic
  • Die size 1 23/200 in fits other manufacturers' tooling kits
  • Hand-held design provides portable operation on site

Knockout punch for sheet metal

The Greenlee 7212SP-3/4P Speed Punch is a hand-held knockout tool designed to cut clean holes in mild steel, aluminum, fiberglass and plastic. It handles material up to 10 ga mild steel and splits slugs in half for easy removal. The three-step setup reduces downtime on the job site. The die size of 1 23/200" matches other manufacturers' tooling kits.

Electricians and maintenance technicians needing

This tool suits professionals who need to punch 3/4" conduit-size holes quickly in panels and enclosures. It is not for fabricators who require larger diameters or heavier gauge capacity beyond 10 ga mild steel. Users without access to a hydraulic driver or ratchet wrench should look at alternative actuation methods. The fixed die size limits use to this single hole dimension.

3/4 inch conduit size with 1 23/200 inch die

The decisive specification is the 3/4" punch size paired with a 1 23/200" die that fits standard tooling systems. This determines whether the tool matches the conduit or fitting you are installing. The 10 ga mild steel rating sets the material thickness limit. Verify both figures against your project requirements before purchase.

Highlights

  • Three-step setup speeds up knockout jobs
  • Splits slugs in half for easy removal from die or stud
  • Handles 10 ga mild steel, aluminum, fiberglass and plastic
  • Die size 1 23/200 in fits other manufacturers' tooling kits
  • Hand-held design provides portable operation on site

Specifications

BrandGreenlee
Model7212SP-3/4P
TypeHand Held Punches

Questions about this item

How do I set up the Greenlee 7212SP-3/4P Speed Punch for a 10 ga mild steel panel, and what step is most often missed?

Insert the draw stud through the pilot hole, thread the die onto the stud from the front side, then tighten the punch onto the stud from the back. The step most often missed is fully seating the die against the material before tightening the punch, which prevents misaligned holes.

What part of the Greenlee 7212SP-3/4P will wear out first when punching 10 ga mild steel repeatedly?

The punch tip and die cutting edges dull first with repeated use on 10 ga mild steel. The split-slug feature reduces binding, but the cutting faces still require periodic sharpening or replacement to maintain clean holes in mild steel, aluminum, fiberglass, and plastic.

What is the first limitation I will hit when using the Greenlee 7212SP-3/4P continuously on 10 ga mild steel?

The primary limit is the maximum material thickness of 10 ga mild steel; attempting thicker material will stall the tool or damage the threads. Operator fatigue from repeated manual force also becomes a practical limit during sustained use on steel, aluminum, fiberglass, or plastic.

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